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Macro suddenly stopped working Excel(Excel) Macro(VBA)

I have been experiencing a phenomenon around me where macros suddenly stop working after having been used normally until yesterday. The phenomenon is that I had set up a macro that is activated by double-clicking on a specific cell, but it no longer responds when double-clicked. I went to "Develop..." to check the contents of the macro.

2024.02.26

Excel Macro (VBA)

Excel RIGHT and LEFT functions to extract a specific number of characters from the right or left of a string

I want to display only the four characters from the right of the data entered in a cell, or I want to display the rest of the data without displaying the left few characters. Conversely, I want to display only 4 characters from the left of the data entered in a cell, or I want to display the rest of the data without displaying the few characters on the right. Thus...

2025.02.19

Excel Functions

Excel: Color Cells When Input Doesn’t Match Dropdown List

In this article, you'll learn how to use conditional formatting in Excel to automatically change cell colors when a value entered doesn't match the dropdown list. If you've been struggling with errors during data aggregation using the VLOOKUP function, you're not alone. Fortunately, combining the MATCH and ISNA functions offers a simple and effective solution.

2025.06.11

Excel Functions

The two reasons for garbled csv files and how to fix them [Thorough explanation by an Excel master] Windows version.

"Huh? What is this?" Have you ever opened a CSV file in Excel only to find that the text in the file is a series of unintelligible symbols? Yes, you are now facing a troublesome problem called "garbled characters," which is a common problem that many people suffer from...

2024.09.12

Excel Functions

Digital certificate can no longer be selected when logging in to a site (Edge)

Have you ever seen the following error message when using login with a digital certificate? The certificate you have selected is not available for this service. Please close all browser windows and try again. Internet ban...

2024.08.02

Edge

How to Disable Automatic Calculation in Excel VBA to Speed Up Your Macros

Learn how to disable automatic calculation in Excel VBA to dramatically speed up your macros. Simple code examples and performance tips included. Boost your Excel automation today!

2025.07.28

Excel Macro (VBA)

How to Fix Missing Sheets in Excel (Step-by-Step Guide)

This article explains how to solve the sheet heading hiding problem in Excel from the options settings. Have you ever had trouble finding a sheet in a file created by someone else? This article is written by the author, who has experience in supporting Excel operations.

2025.06.06

Excel Functions

Measure macro processing time Excel(Excel) Macro(VBA)

When trying to speed up a macro, it is first necessary to be able to determine how much time was saved before and after the improvement, and how much time was saved or not. To do this, it is necessary to be able to measure the time. In this article, we will show you how to do this. In this article, we will discuss the process of...

2024.01.03

Excel Macro (VBA)

Automatically create invoices from sales invoices1 Excel (Excel)

There are many useful software systems that automatically output invoices as you record sales data if you pay for them, but many people are unable to install software because they "don't have enough money to pay for it" or "management won't allow it" and are making each invoice by hand...

2024.06.10

Excel FunctionsLet's make an invoice from a sales invoice.

How to Change Digital Certificate Display Names in Microsoft Edge for Easy Identification

How to Change Digital Certificate Names in Edge | Stop Certificate Confusion. Set friendly names for easy identification. Step-by-step guide to distinguish multiple certificates in Microsoft Edge browser.

2025.07.03

Edge